About Energy Localization of Nonlinear and Linear Oscillations of Atoms in a Model of Crystal Lattice of A3B Stehiometry

N.N. Medvedev, M.D. Starostenkov, P.V. Zakharov, A.V. Markidonov show affiliations and emails
Accepted: 24 April 2013
This paper is written in Russian
Citation: N.N. Medvedev, M.D. Starostenkov, P.V. Zakharov, A.V. Markidonov. About Energy Localization of Nonlinear and Linear Oscillations of Atoms in a Model of Crystal Lattice of A3B Stehiometry. Lett. Mater., 2013, 3(1) 34-37
BibTex   https://doi.org/10.22226/2410-3535-2013-1-34-37

Abstract

A three- dimensional molecular-dynamics model of Pt3Al with L12 order was developed and found to support the excitation of discrete breathers (DBs) and energy localization on the Al sublat-tice. For an initial lattice temperature of 0 K, large-amplitude DBs polarized along [100] are found to be very weakly damped, retaining most of their initial energy for more than 1000 cycles, while DBs polarized along [111] damped out over ~15 cycles. Because the DBs and their dissipation channels are confined to the Al sublattice, long-lived states with large energy differences between the Al and Pt sublattices occur.

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1.
N. N. Medvedev, M. D. Starostenkov, A. I. Potekaev, P. V. Zakharov, A. V. Markidonov, A. M. Eremin. Russ Phys J. 57(3), 387 (2014). Crossref